Sash-lock.



E, A. DoNAT.

l sAsH Loox. -APPLIUATION FILED 00T. 12, 1910.

Patenteiy Mar. 14, 191.1.

rmt NoRRls PETERS co,. wAsmNcTo-N, I:4 cA

EDWIN A. DONAT, 0F WANAMAKERS, PENNSYLVANIA.

SASH-LOCK.

Specification of Letters Patent.

Patented Mar. 14, 1911.

Application filed October 12, 1910. Serial No. 586,689.

l'o all whom t may concern:

Be it known that I, EDWIN A. DoNA'r, a citizen of the United States,residing at lVanamakers, in the county of lLehigh and State ofPennsylvania, have invented certain new and useful Improvements in Sash-Locks, of which the following is a specification, reference being had tothe accompanying drawings.

This invention relates to improvements in sash locks and has for itsobject to provide a lock of the above character which will absolutelylock the sash when closed to prevent the same being forced open in anattempt to enter the apartment.

A further object of the present invention is to provide a pivoted springactuated primary locking element and an auxiliary locking bolt, andmeans being arranged between the locking element and the bolt andactuated by the latter to release said element and permit of itsmovement to locking position.

Another object of the invention is to provide means for rendering thelocking bolt inoperative whereby the pivoted locking element may beindependently actuated to lock the sashes.

A still further object of the invention resides in the provision of asash lock mechanism of comparatively simple construction and one whichis automatically actuated by the movement of the sashes to closedposition, said mechanism being of such construction that the sashes maybe unlocked with or without the use of a key as desired.

With these and other objects in view, the invention consists of thenovel features of construction, combination and arrangement of partshereinafter fully described and claimed, and illustrated in theaccompanying drawings, in which-- Figure 1 is a perspective view offragments of the upper and lower sashes illustrating the arrangement ofmy improved lock mechanism thereon; Fig. 2 is an enlarged top plan view,the lock casing being shown in section and the sashes locked together;Fig. 3 is a similar view showing the relative positions of the lockingelements when the sashes are unlocked; Fig. 4 is a section taken on theline 444; of Fig. 2; Fig. 5 is a section taken on the line 5 5 of Fig.3; Fig. 6 is a detail perspective view of the locking bolt; Fig. 7 is asimilar view of the sliding plate to prevent thel movement of the boltto locking position; Fig.

8 is a detail perspective view of the locking dog; Fig. 9 is a detailsection taken on the line 9-9 o f Fig. 3; and Fig. 10 is a detailperspective view of the pawl arranged between the locking dog and thebolt.

Referring more particularly to the drawings S indicates the sashes whichare arranged in the window frame for vertical sliding movement in theusual manner. Upon the upper' rail of the lower sash and the lower railof the upper sash my improved lock is adapted to be arranged. The lockmechanism is housed within the casing sections 5 which are secured tothe rails of the sashes. Each of these casing sections is substantiallysemicircular inform and comprises a top plate and a side wall 5', theside wall having formed on its lower edge laterally extending ears 5fLto receive suitable fastening screws by means of which the casing issecured to the sash rail. These casing sections have no bottoms, but thesection 5 arranged on the rail of the lower sash has a base plate 6therein which is rigidly secured upon the sash by means of a screw 7extending through the top of the casing and through said plate into thesash rail. Upon the outer edge of the base plate 6 a verticallongitudinal plate 8 is formed at one end, said plate being rigidlyfastened in any desired manner to the top of the lock case. Thisvertical wall is provided with a rectangular opening 9 for a purposewhich will more fully hereinafter appear. A lug or enlargement 8 is alsoformed upon the base plate at the edge thereof, the purpose of whichwill be later pointed out.

The case'section 5 which is arranged upon the upper sash rail is formedat its outer edge with a longitudinal wall 10 and said wall has anopening 10 formed therein which when the sashes are closed alines withthe opening 9 in the front wall of the base plate 6. A locking dog 11 isarranged within the casing 5 on the lower sash rail. One end of this dogis rigidly fixed upon a pivot pin 12 which is rotatably mounted in thetop of the case 5 and has its lower end journaled in the base plate 6.The dog 11 is curved at its outer end as shown at 1l and is adapted toextend beneath the top plate of the case 5 on the upper sash rail andengage over an inwardly extending lug 13 which is formed on the end ofthe vertical wall 10 of the upper lock casing. A coiled spring 14 isarranged upon the pivot 12, the

Y pivoted end of the dog 11 being cut away to provide a'rshoulder 11awith which one end of Vsaid spring engages, the other end of the springbearing upon the front wall 8 ofV the base plate 6. To the upper end ofthe' pivot 12- a handle or linger-piece 15 is se cured by Vmeans 'ofwhich the dog 11 is adapted to be moved into locking position.

kA bolt 16 is slidably mounted upon the base plate 6 and is arranged ina U-shaped guide 17 which is secured to said base plate, a vertical arm17 being also secured to the baseV plate to guide the outer end of thetumbler adjacent to the opening 9 inthe vertical wall 8. This bolt isnormally forced outwardly by means of a spring 18, one end of which issecured to, the side wall 8 `of the base plate, the other end of saidspring being engaged in a notch or recess v19 provided in one side ofthe tumbler. A shoulder 20 is formed on the edge of the locking dog 11at its pivoted end, and with this i shoulder one end of a pawl 21 isadapted to engage to vsrecure thelocking dog 'in its released position.The pawl 21 is pivoted intermediate of its ends upona stud 22risingvfrom the base plate 6, and the other end of said pawl is slightlycurved as indicated at v2l for engagement byy a trip plate 23 carried bythe longitudinally Vmovable bolt bar 16. This trip plate is pivoted inan opening 24 extending inwardly from one side of the tumbler. Theforward end wall of this opening is vertical while the rear end wallthereof is .beveled longitudinally of the tumbler as'indicated at 24. Itwill be observed that the trip plate 23 is pivoted in this openingadjacent to the forward vertical wall thereof and that the same projectsoutwardly and slightly beyond the side of the tumbler. The pawl 21 isnormally held yieldingly in engagement with the pivoted dog 11 by meansof a spring 25, one end of which is secured to the front wall 8 of thebase plate. The trip plate 23 is normally held against Vpivotal movementand against the. vertical Y. of the` spring 18'thereby engaging theouter Y' 'Vend of the trip plate 23 with the curved end of'thepawl 21 todisengage said pawl from the shoulder V20` formed on the pivoted end ofthe dog 11,.' The sliding bolt 16 is formed A, A* upon one sidewith ashoulder 26 whichengages with the inner face of the vertical wall 8ofthe base plate 6 to limit the outward movement of said tumbler. Thisbolt is also formed Wwith a notch or recess 28 to receive a lug formedon the end of the key 29, a suitable key hole 30 being provided in thetop of the case 5 to receive the key, the end of which engages with anopening 31 formed in the bottom plate 6 adjacent to the bolt.

In the operation of the lock so far as the same has been described, theoperator moves the locking dog 11 by means of the fingerpiece 15 on theupper end thereof, into the lock case 5 until the end of the springpressed pawl 21 engages with the shoulder 20 on the pivoted end of saiddog. It will therefore be obvious that when the window sashes areclosed, the engagement of the outer end of the bolt 16 withl the rail ofthe upper sash will move said tumbler inwardly and disengage the pawlfrom the locking dog as previously described, thus allowing the spring14 to move said dog into the case on the upper sash rail, said springhaving been placed under tension by manual movement of the locking dog.When the sashes are completely closed, the spring 18 forces the boltoutwardly again and through t-he opening 9 in the vertical wall 8 andthe opening l0 in the .wall 10 of the lock case sections. In order torelease the sashes the ,key 29 must be inserted and the lug thereonengaged in the notch 28 in the side of the bolt and the key then turnedto force the bolt inwardly into the lock case. In this movement of thebolt bar, the trip plate 23 engages the curved end of the pawl 21. Thedog 11 is now manually moved to its released position, the spring 25forcing the pawl into engagement with the shoulder thereon. When the keyis removed the bolt 16 is forced outwardly by the spring 18 and the tripplate 23 is forced into the opening 24 of said bolt when it engages theend of the pawl 21. After passing the pawl, the spring 26 forces thetrip plate into engagement with the outer end wall of the opening 24 sothat it is in position to engage the pawl 21 and release the springactuated dog 11 when the sliding bolt 16 is moved into the case sectionin the closing movement of the sashes.

Then it is desired to prevent the locking engagement of the bolt withthe upper sash rail, a sliding plate 32. is moved over the opening' 10in the vertical wall 10 of the case on the upper sash to close the sameand prevent the projection of the bolt bar into said opening. This plateis rigidly secured to the lower end of an operating stud 33 whichprojects through a slot 34 in the top of the case 5. The face of thewall 10 inwardly of the opening 10 is cut away, the plate 32 having itsouter surface disposed in the same plane therewith. The lower edge ofthe plate 32 is beveled for engage-V ment in a V-shaped guide groove 35.A short slot 10a is provided in the reduced inner end of the wall 10 toreceive the operating bar or stud 33 in the movement of said plate. Itwill now be seen that when the sashes are moved to closed position, thesliding bolt will be forced inwardly to release the spring pressedlocking dog 11, said bolt being held against movement into the opening10 by means of the plate 32. Thus it is unnecessary to use the key inreleasing the sashes, the operator simply moving the dog by turning thehandle on the upper end of the pivot of said dog until the pawl 21engages the shoulder of the dog and holds the same in its releasedposition. In order to provide further assurance against unauthorizedopening of the window sashes by persons desiring to force an entranceinto the apartment, I provide a dead locking element 36. This element isin the form of a plate angularly bent at points intermediate of its endsto provide an outwardly projecting portion 36 which is ada ted to beengaged by the end of the sliding bolt 16. This lateral extension of theplate is formed adjacent to one end of the same, the other end of saidplate being bent at right angles as at 37 to provide a detent forengagement in a notch or recess 3S in the curved end of the pivotedlocking dog l11. The plate 36 has formed upon one of its longitudinaledges an ear 39 through which a pivot pin extends, said pin being fixedin the top of the lock case 5. A coiled spring 40 is also arranged uponthis pin and one end of said spring is engaged with the plate 36 whilethe other end thereof bears against a pin fixed in the bottom of thecase, as shown. It will be seen from the above that when the spring 18forces the sliding bolt bar 16 through the alined openings 9 and 10, theend of said bolt will engage the laterally disposed end portion 36 ofthe dead locking plate and force the same inwardly against the tensionof the spring 40. This spring 40 is of less strength than the spring 18,and is overcome by the action of the same. The other end of the plate 36is thus moved outwardly and the detent 37 thereon engaged in the notch38 of the pivoted locking dog 11. The dog 11 is thus securely heldagainst any possibility of movement to its released position, until theproper key is inserted and engaged with the sliding tumbler to move thesame and permit the spring 40 to return the dead locking plate to itsnormal position whereby the locking dog 11 is released so that the sameis moved out of the lock case on the upper sash when the pawl 21 hasbeen disengaged therefrom by the inward movement of the bolt 16.

From the foregoing it is believed that the construction and operation ofmy improved sash lock will be readily understood without additionalexplanation.

The device is comparatively simple in construction and highly eiiicientin practical use. The lock may be easily and quickly manipulated torelease the sashes for relative sliding movement and the locking of thesashes when they are closed is entirely automatical. By means of thedead locking device which is employed, the liability of insertion of aninstrument between the sashes to move the dog 11 to released position isreduced to a minimum thereby also materially decreasing the probabilityof intruders entering the apartment.

While I have shown and described the preferred construction andarrangement of the various parts, it will be understood that the deviceis susceptible of a great many minor modifications in the form andproportion of the parts without departing from the essential feature orsacrificing any of the advantages of the invention.

Having thus described the invention what is claimed is z* 1. In a sashlock, a two-part casing adapted v to be secured to the upper and lowersashes respectively of a window, a pivoted locking dog in one of thecasing sections adapted to project into the other section, a slidableauxiliary locking bolt to project through the opposed walls of thecasing sections, and a movable element arranged between the locking dogand said bolt and actuated by the latter to permit of the movement ofthe locking dog to its lockingposition.

2. In a sash lock, a two-part casing adapted to be secured to the upperand lower sashes respectively of a window, a pivoted spring pressedlocking dog in one of the casing sections, a slidable auxiliary lockingbolt in said sect-ion adapted to project through the opposed walls ofthe casing sections, and a movable element arranged between the dog andthe bolt and adapted to be automatically actuated in the slidingmovement of the latter to release the dog whereby said dog is moved toits locking position.

3. In a sash lock, a two-part casing adapted to be secured to the upperand lower sashes of a window, a pivoted spring actuated locking dogarranged in one of the casing sections and having a shoulder on itspivoted end, a sliding bolt in said section, said sections havingopenings in their opposed walls adapted to register when the sashes areclosed, a spring normally forcing said bolt through the openings in thecasing sections, a movable element arranged between the dog and the boltand engaged with the shoulder on said dog to retain the same in itsreleased position, and means carried by the bolt to engage said elementand release the dog for movement to its locking position.

4;. In asash lock,atwopart casing adapted .a spring acting to force saiddog into its locking position, said dog being movable into the casingsection on the upper sash, a

-spring actuated sliding bolt arranged adjacent to said dog, a pivotedspring pressed pawl arranged between the bolt and the dog, said dogbeing engaged by one end of the n pawl t-o retain said dog initsreleased position against the action of said spring, and aspring-pressed trip plate carried by the bolt and adapted to engage saidpawl in the sliding movement of the bolt to disengage the same from thedog whereby the dog is moved .to its locking position.

Y 5. In a sash lock, a two-part casing adapted to be secured to theupper and lower sashes of a window, a dog pivotally mounted in thecasing section on the lower sash, a finger-piece fixed on the pivot ofsaid dog to move the same to its released position, a spring normallyacting to move the dog into its locking position into the other casingsection, the opposed walls of said casing sections ,Y having openingstherein which are brought into register when the sashes are closed, a

I sliding bolt arranged adjacent to the dog,

a spring normally acting to force the bolt outwardly through the alinedopenings in the casing sections, a pivoted spring pressed pawl arrangedbetween the dogl and the tumbler, said bolt having an opening therein, atrip plate pivotally mounted in said opening and extending beyond theside of the bolt for engagement with one end of said pawl, the other endof said pawl engaging withV the locking dog to maintain the same in itsreleased position, and a spring in the opening of the bolt to yieldinglyhold the trip plate in position for engagement with the pawl in thesliding movement of the bolt whereby said pawl is disengaged from thedog and the dog moved to locking position in the other of the casingsections.

6. In a sash lock, a two-part casing ada-pted to be secured to the upperand lower sashes of a window, a base plate arranged in the casing on thelower sash, said plate having a vertical longitudinal wall at its outeredge and at one side thereof, a vertical wall at the outer edge of theother casing section, said walls having openings therein adapted toregister when the sashes are closed, a pivoted spring actuated dog inthe casing on the lower sash, a spring actuated :sliding bolt arrangedadjacent to said dog,

means arranged between the bolt and the dog to retain the latter in itsreleased position, means carried by the bolt to automatically actuatesaid last named means and release the dog for movement to its lockingposition, said dog projecting through the vertical walls of said baseplate and the upper casing section, 'and a dead' locking clementarranged in the casing section on the upper sash adapted to be engagedby said bolt and move said element into engagement wit-h the dog toretain the same in its locking position againstmovement independent ofthe bolt.

i 7. In a sash lock, a two-part casing adapted to be secured to theupper and lower sashes of a window, a spring actuated locking dogarranged in the casing section on the lower sash and adapted to beprojected through the casing on the upper sash to lock the sashestogether, means for holding said dog in its released position, a slidingbolt to actuate said last named means in its slidingmovement and releasethe dog for movement to its locking position, a spring controlled deadlocking element arranged lin the casing section on the upper sash, saidbolt being adapted tol extend into the upper casing section and engagesaid element to move the same into engagement with the locking dog toretain said dog in its' locking position.

8. In a sash lock, a *wo-part casing adapted to be secured to the upperand lower sashes respectively of a window, a spring actuated slidingbolt mounted in one of the casing sections, the opposed walls of saidcasing sections being provided with openings through which said bolt isprojected when the sashes are moved to their closed positions to lockthe same together, a pivoted locking element arranged in the first namedsection and controlled by the sliding movement of the bolt, means formoving said element to locking position and means slidably mounted inthe last named casing section to be moved across the open` ing thereinand prevent the projection of the bolt into said section.

9. In a sash lock, a two-part casing adapted to be secured to the upperand lower sashes respectively of a window, the opposed walls of saidcasing sections' each being provided with an opening adapted to alinewhen the sashes are closed, a spring actuated sliding bolt mounted inone of the casing sections and projecting through the opening therein,the end of said bolt being beveled to engage the upper edge of the othercasing section in the closing movement of the sashes whereby said boltis forced inwardly to place the spring under tension, said springprojecting the bolt through the openings of the casing sections when thesashes are closed, a pivoted spring actuated locking dog mounted in thefirst named casing section and movableinto the other section, meansnormally holding said dog in its unlocked position, said latter meansbeing actuated in the inward movement of the bolt to release the dog andpermit of its movement to locking position, vand a sliding ICO Al l 5plate in the other easing section movable over the opening therein toprevent the movement of the bolt into said easing section.

10. In a sash look, a two-part casing adapted to be secured to the upperand lower sashes respectively of a window, a sliding bolt arranged inone of the casing sections and movable into the other section in themovement of the sashes to their closed positions to lock the sashestogether, said bolt being movable into the casing section in the closingmovement of the sashes, additional locking means controlled by theinward movement of the bolt, means for moving said latter means tolocking position, and an adjustable element Carried by the other easingsection movable into the path of movement of the sliding tumbler toprevent ts movement to locking position.

In testimony whereof I hereunto aiix my signature in the presence of twowitnesses.

EDWIN A. DONAT. Witnesses JAS. A. MILLER, CALVIN N. DONAT.

Copies of this patent may be obtained for five cents each, 'byaddressing the Commissioner of Patents, Washington, D. C.

